The issue that I haven't seen mentioned is that whilst yes your intention was to show a cheap bargain and use them outside of airsoft games - A person could see them posted here, not read the rest of the context, go out to Lidl and buy a set, rock up to airsoft and then their next post is "I bought goggles I saw on an airsoft page and now I have 1 eye - It's all their fault!!!"
Extreme? Yes, however stupidity is everywhere 😂
Roughly nine years ago my at the time regular site had a chap rock up with some cheap safety glasses (Think the type that comes with those £20 springer and BB bundles) who assumed as it was bought from an airsoft (More so hobby store where they sell samurai swords etc too, you know the types I'm sure!) store that they would be fine to use. He was walking back to respawn and had got a stray BB hit his glasses, shatter them and LUCKILY the BB hit just under his eye. I saw him again maybe 6 months later and he was still having trouble with where the BB had hit him and it had caused damage still. He tried to sue the site for negligence (It didn't go very far obviously) but it put the site owner at risk, all because he didn't do his due diligence and ensure he had correct safety gear.
There's more to it than just you getting hurt. Imagine if you was the player that had shot at someone, not expecting to hit their eye protection (BB's aren't exactly known to go exactly where you want them to 99% of the time) and the next thing you know the dude you've just shot is on the floor screaming in pain because his cheap eye pro broke and now he has plastic splinters in his eye ball - That would be traumatic for everybody I reckon 😂 The site owners would also have to fill out an incident form for their insurance, which then puts that cost up for them. Sadly most sites are struggling financially as it is in this day and age, the last thing they'd need is premiums going up too. One accident from misjudgement or poor decision making from an individual can spiral into a big ordeal.
I hope I don't come across as rude or targeting towards you as that's not my intention at all, I genuinely just don't want to see people getting hurt outside of "Ouch the BB hit me and it stung" 😂